I have been looking at different upgrades for my Remy 700 SPS Tactical .308. I have noticed on some Remy Bolt Action rifles the bolts have a "stainless polished" look to them compared to the normal bolt. Is this an upgraded bolt, or a smiths custom work. And are there any benefits from this. I am very new to the Bolt Action scene and shooting. Any input would be greatly appreciated. Thank you.